There are three possible ways to pronounce 'ed' endings:
1. /ɪd/ like wanted, needed, hated, decided
2. /d/ like loved, phoned, tried, played
3. /t/ like stopped, asked, wished, passed
So, how do you know which one to use?
1. 'ed' endings are pronounced /ɪd/ if the infinitive ends in the sound /t/ or /d/ (want, need, hate, decide - even though these last two have an 'e' at the end, the last sound is a /t/ or/d/)
2. They are pronounced /d/ if the infinitive ends in a voiced sound. This means that the sound vibrates in your throat when you say it. Put your fingers at the front of your throat and feel the sounds at the end of love, phone, try and play.
3. The third option, /t/, is used if the infinitive ends in an unvoiced sound. Compare the feeling in your throat when you say the words stop, ask, wish and pass. You don't need your voice to make the final sound.
Here is a short story to practise the pronunciation of 'ed' endings - can you pronounce them all correctly?
As he walked along the street, he decided he wanted to buy a drink. He stopped at a small shop and asked for a bottle of cold water. He also wanted some chewing gum, but the shop didn't have any. He started walking again and listened to the radio on his mobile phone. After a few minutes, his girlfriend called him. She asked him what time he would be home, and told him she loved him. When he arrived at their house, she had cooked a delicious meal and decorated the room with candles.